[Building error]: /usr/bin/ld: CMakeFiles/zimg.dir/zaccess.c.o:(.bss+0x0): multiple definition of `settings'; CMakeFiles/zimg.dir/main.c.o:(.bss+0x20): first defined here

[gadefox]

I'm trying to build the lib from the source (make in the root) and I'm getting the following error. Any idea??

/usr/bin/ld: CMakeFiles/zimg.dir/zaccess.c.o:(.bss+0x0): multiple definition of settings'; CMakeFiles/zimg.dir/main.c.o:(.bss+0x20): first defined here /usr/bin/ld: CMakeFiles/zimg.dir/zaccess.c.o:(.bss+0xd80): multiple definition of thread_key'; CMakeFiles/zimg.dir/main.c.o:(.bss+0xda0): first defined here
/usr/bin/ld: CMakeFiles/zimg.dir/zcache.c.o:(.bss+0x0): multiple definition of settings'; CMakeFiles/zimg.dir/main.c.o:(.bss+0x20): first defined here /usr/bin/ld: CMakeFiles/zimg.dir/zcache.c.o:(.bss+0xd80): multiple definition of thread_key'; CMakeFiles/zimg.dir/main.c.o:(.bss+0xda0): first defined here
/usr/bin/ld: CMakeFiles/zimg.dir/zdb.c.o:(.bss+0x0): multiple definition of settings'; CMakeFiles/zimg.dir/main.c.o:(.bss+0x20): first defined here /usr/bin/ld: CMakeFiles/zimg.dir/zdb.c.o:(.bss+0xd80): multiple definition of thread_key'; CMakeFiles/zimg.dir/main.c.o:(.bss+0xda0): first defined here
/usr/bin/ld: CMakeFiles/zimg.dir/zhttpd.c.o:(.bss+0x0): multiple definition of settings'; CMakeFiles/zimg.dir/main.c.o:(.bss+0x20): first defined here /usr/bin/ld: CMakeFiles/zimg.dir/zhttpd.c.o:(.bss+0xd80): multiple definition of thread_key'; CMakeFiles/zimg.dir/main.c.o:(.bss+0xda0): first defined here
/usr/bin/ld: CMakeFiles/zimg.dir/zimg.c.o:(.bss+0x0): multiple definition of settings'; CMakeFiles/zimg.dir/main.c.o:(.bss+0x20): first defined here /usr/bin/ld: CMakeFiles/zimg.dir/zimg.c.o:(.bss+0xd80): multiple definition of thread_key'; CMakeFiles/zimg.dir/main.c.o:(.bss+0xda0): first defined here
/usr/bin/ld: CMakeFiles/zimg.dir/zlog.c.o:(.bss+0x0): multiple definition of settings'; CMakeFiles/zimg.dir/main.c.o:(.bss+0x20): first defined here /usr/bin/ld: CMakeFiles/zimg.dir/zlog.c.o:(.bss+0xd80): multiple definition of thread_key'; CMakeFiles/zimg.dir/main.c.o:(.bss+0xda0): first defined here
/usr/bin/ld: CMakeFiles/zimg.dir/zlscale.c.o:(.bss+0xd80): multiple definition of thread_key'; CMakeFiles/zimg.dir/main.c.o:(.bss+0xda0): first defined here /usr/bin/ld: CMakeFiles/zimg.dir/zlscale.c.o:(.bss+0x0): multiple definition of settings'; CMakeFiles/zimg.dir/main.c.o:(.bss+0x20): first defined here
/usr/bin/ld: CMakeFiles/zimg.dir/zscale.c.o:(.bss+0x0): multiple definition of settings'; CMakeFiles/zimg.dir/main.c.o:(.bss+0x20): first defined here /usr/bin/ld: CMakeFiles/zimg.dir/zscale.c.o:(.bss+0xd80): multiple definition of thread_key'; CMakeFiles/zimg.dir/main.c.o:(.bss+0xda0): first defined here
/usr/bin/ld: CMakeFiles/zimg.dir/zspinlock.c.o:(.bss+0x0): multiple definition of settings'; CMakeFiles/zimg.dir/main.c.o:(.bss+0x20): first defined here /usr/bin/ld: CMakeFiles/zimg.dir/zspinlock.c.o:(.bss+0xd80): multiple definition of thread_key'; CMakeFiles/zimg.dir/main.c.o:(.bss+0xda0): first defined here
/usr/bin/ld: CMakeFiles/zimg.dir/zutil.c.o:(.bss+0x0): multiple definition of settings'; CMakeFiles/zimg.dir/main.c.o:(.bss+0x20): first defined here /usr/bin/ld: CMakeFiles/zimg.dir/zutil.c.o:(.bss+0xd80): multiple definition of thread_key'; CMakeFiles/zimg.dir/main.c.o:(.bss+0xda0): first defined here
/usr/bin/ld: CMakeFiles/zimg.dir/home/fox/.build/zimg-3.1.0/deps/libevhtp/evthr.c.o:(.bss+0x0): multiple definition of thread_key'; CMakeFiles/zimg.dir/main.c.o:(.bss+0xda0): first defined here /usr/bin/ld: CMakeFiles/zimg.dir/home/fox/.build/zimg-3.1.0/deps/libevhtp/evhtp.c.o:(.bss+0x0): multiple definition of thread_key'; CMakeFiles/zimg.dir/main.c.o:(.bss+0xda0): first defined here
/usr/bin/ld: CMakeFiles/zimg.dir/home/fox/.build/zimg-3.1.0/deps/multipart-parser-c/multipart_parser.c.o:(.bss+0x0): multiple definition of settings'; CMakeFiles/zimg.dir/main.c.o:(.bss+0x20): first defined here /usr/bin/ld: CMakeFiles/zimg.dir/home/fox/.build/zimg-3.1.0/deps/multipart-parser-c/multipart_parser.c.o:(.bss+0xd80): multiple definition of thread_key'; CMakeFiles/zimg.dir/main.c.o:(.bss+0xda0): first defined here

[daidehu6831]

The default "-fcommon" flag changed to "-fno-common" in GCC 10.
This problem is fixed by adding -DCMAKE_C_FLAGS=-fcommon into Makefile when running cmake.

[ZhangPengchao]

您的邮件已收到，谢谢！

[libin47]

遇到了同样的问题，方案如下：

• 修改src/zcommon.h文件
  将其中的

struct setting{...} settings;

改为

struct setting{};
extern struct setting settings;

• 新建src/zcommon.c

#include "zcommon.h"
struct setting settings;

• 修改deps/libevhtp/evthr.h文件

pthread_key_t thread_key;
改为
extern pthread_key_t thread_key;

• 修改deps/libevhtp/evthr.c文件
  在30行后新加一行

pthread_key_t thread_key;

然后删掉build目录，重新make就可以了

[ZhangPengchao]

您的邮件已收到，谢谢！